Create custom hostnames
There are several required steps before a custom hostname can become active. For more details, refer to our Get started guide.
To create a custom hostname:
- Log in to the Cloudflare dashboard and select your account.
 - Select your Cloudflare for SaaS application.
 - Navigate to SSL/TLS > Custom Hostnames.
 - Click Add Custom Hostname.
 - Add your customer’s hostname 
app.customer.comand set the relevant options, including:- Choosing the Validation method.
 - Whether you want to Enable wildcard, which adds a 
*.<custom-hostname>SAN to the custom hostname certificate. For more details, refer to Hostname priority. - Choosing a value for Custom origin server.
 
 - Click Add Custom Hostname.
 
To create a custom hostname using the API, use a POST command on the /zone/:zone_id/custom_hostnames endpoint.
The response contains the complete definition of the new custom hostname.